
/**
	* jQuery BASE64 functions
	*
	* 	<code>
	* 		Encodes the given data with base64.
	* 		String jQuery.base64Encode ( String str )
	*		<br />
	* 		Decodes a base64 encoded data.
	* 		String jQuery.base64Decode ( String str )
	* 	</code>
	*
	* Encodes and Decodes the given data in base64.
	* This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.
	* Base64-encoded data takes about 33% more space than the original data.
	* This javascript code is used to encode / decode data using base64 (this encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean). Script is fully compatible with UTF-8 encoding. You can use base64 encoded data as simple encryption mechanism.
	* If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag).
	* This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin.
	*
	* Example
	* 	Code
	* 		<code>
	* 			jQuery.base64Encode("I'm Persian.");
	* 		</code>
	* 	Result
	* 		<code>
	* 			"SSdtIFBlcnNpYW4u"
	* 		</code>
	* 	Code
	* 		<code>
	* 			jQuery.base64Decode("SSdtIFBlcnNpYW4u");
	* 		</code>
	* 	Result
	* 		<code>
	* 			"I'm Persian."
	* 		</code>
	*
	* @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
	* @link http://www.semnanweb.com/jquery-plugin/base64.html
	* @see http://www.webtoolkit.info/
	* @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
	* @param {jQuery} {base64Encode:function(input))
	* @param {jQuery} {base64Decode:function(input))
	* @return string
	*/

(function(jQuery){

	var keyString = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

	var uTF8Encode = function(string) {
		string = string.replace(/\x0d\x0a/g, "\x0a");
		var output = "";
		for (var n = 0; n < string.length; n++) {
			var c = string.charCodeAt(n);
			if (c < 128) {
				output += String.fromCharCode(c);
			} else if ((c > 127) && (c < 2048)) {
				output += String.fromCharCode((c >> 6) | 192);
				output += String.fromCharCode((c & 63) | 128);
			} else {
				output += String.fromCharCode((c >> 12) | 224);
				output += String.fromCharCode(((c >> 6) & 63) | 128);
				output += String.fromCharCode((c & 63) | 128);
			}
		}
		return output;
	};

	var uTF8Decode = function(input) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;
		while ( i < input.length ) {
			c = input.charCodeAt(i);
			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			} else if ((c > 191) && (c < 224)) {
				c2 = input.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			} else {
				c2 = input.charCodeAt(i+1);
				c3 = input.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
		}
		return string;
	}

	jQuery.extend({
		base64Encode: function(input) {
			var output = "";
			var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
			var i = 0;
			input = uTF8Encode(input);
			while (i < input.length) {
				chr1 = input.charCodeAt(i++);
				chr2 = input.charCodeAt(i++);
				chr3 = input.charCodeAt(i++);
				enc1 = chr1 >> 2;
				enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
				enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
				enc4 = chr3 & 63;
				if (isNaN(chr2)) {
					enc3 = enc4 = 64;
				} else if (isNaN(chr3)) {
					enc4 = 64;
				}
				output = output + keyString.charAt(enc1) + keyString.charAt(enc2) + keyString.charAt(enc3) + keyString.charAt(enc4);
			}
			return output;
		},
		base64Decode: function(input) {
			var output = "";
			var chr1, chr2, chr3;
			var enc1, enc2, enc3, enc4;
			var i = 0;
			input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
			while (i < input.length) {
				enc1 = keyString.indexOf(input.charAt(i++));
				enc2 = keyString.indexOf(input.charAt(i++));
				enc3 = keyString.indexOf(input.charAt(i++));
				enc4 = keyString.indexOf(input.charAt(i++));
				chr1 = (enc1 << 2) | (enc2 >> 4);
				chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
				chr3 = ((enc3 & 3) << 6) | enc4;
				output = output + String.fromCharCode(chr1);
				if (enc3 != 64) {
					output = output + String.fromCharCode(chr2);
				}
				if (enc4 != 64) {
					output = output + String.fromCharCode(chr3);
				}
			}
			output = uTF8Decode(output);
			return output;
		}
	});
})(jQuery);

